DL closed-loop MIMO Transmission (4 layers): to verify that gNB supports closed-loop DL single user 4 layers transmission with 4T4R or 8T8R configuration
DL closed-loop MIMO Transmission (2 layers): to verify that gNB supports closed-loop DL single user 2 layers transmission with 4T4R or 8T8R configuration
Like here UE is reporting RI, PMI to eNB & based on that precoding is performed at TX side or eNB side, as per quote we can see when we have 4x4 config, we have 4 layers here.
So can any please help to understand, when we will be having 8x8 config, is 8 layers are the most desirable MIMO?
Also when 4 layers & 2 layers transmission is used with 8x8 config?